Valgrind throws Invalid write of size 8 using smart pointers

I am trying to implement a binary tree with the following code:

Node* Node::addLeft(int v){
   left = make_shared<Node> (v).get();
   //cout<<"set left "<<left->value<<endl;
   left->parent=this;
   return this;
}

When running valgrind, I've got the following report:

==18345== Invalid write of size 8
==18345==    at 0x400F26: Node::addLeft(int) (Ex9.2.cpp:264)
==18345==    by 0x401182: main (Ex9.2.cpp:360)
==18345==  Address 0x5ab61f8 is 40 bytes inside a block of size 48 free'd
==18345==    at 0x4C2F24B: operator delete(void*) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==18345==    by 0x402603: __gnu_cxx::new_allocator<std::_Sp_counted_ptr_inplace<Node, std::allocator<Node>, (__gnu_cxx::_Lock_policy)2> >::deallocate(std::_Sp_counted_ptr_inplace<Node, std::allocator<Node>, (__gnu_cxx::_Lock_policy)2>*, unsigned long) (new_allocator.h:110)
==18345==    by 0x4023DC: std::allocator_traits<std::allocator<std::_Sp_counted_ptr_inplace<Node, std::allocator<Node>, (__gnu_cxx::_Lock_policy)2> > >::deallocate(std::allocator<std::_Sp_counted_ptr_inplace<Node, std::allocator<Node>, (__gnu_cxx::_Lock_policy)2> >&, std::_Sp_counted_ptr_inplace<Node, std::allocator<Node>, (__gnu_cxx::_Lock_policy)2>*, unsigned long) (alloc_traits.h:517)
==18345==    by 0x40211D: std::__allocated_ptr<std::allocator<std::_Sp_counted_ptr_inplace<Node, std::allocator<Node>, (__gnu_cxx::_Lock_policy)2> > >::~__allocated_ptr() (allocated_ptr.h:72)
==18345==    by 0x402885: std::_Sp_counted_ptr_inplace<Node, std::allocator<Node>, (__gnu_cxx::_Lock_policy)2>::_M_destroy() (shared_ptr_base.h:539)
==18345==    by 0x401649: std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release() (shared_ptr_base.h:167)
==18345==    by 0x40135C: std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count() (shared_ptr_base.h:659)
==18345==    by 0x401315: std::__shared_ptr<Node, (__gnu_cxx::_Lock_policy)2>::~__shared_ptr() (shared_ptr_base.h:925)
==18345==    by 0x401331: std::shared_ptr<Node>::~shared_ptr() (shared_ptr.h:93)
==18345==    by 0x400F19: Node::addLeft(int) (Ex9.2.cpp:262)
==18345==    by 0x401182: main (Ex9.2.cpp:360)

Do you have an idea about this error? Any help would be appreciated !